In India, a caste system organizes division of labour and money in human society. Historically, it defined communities into thousands of endogamous hereditary groups called Jātis. The Jātis were grouped by the Brahminical texts under four categories, known as varnas; viz Brahmins,  Kshatriyas, Vaishyas, and Shudras. Certain people (the Dasas) were excluded altogether, ostracized (picked out to be not be mentioned) by all other castes and treated as untouchables. 

Brahmin and Brahma have different meanings. Brahman refers to the Supreme Self. Brahmin (or Brahmana) refers to an individual belonging to the Hindu priest, artists, teachers, technicians class.  

Originally, the Sanskrit term Kshatriya belonged to the Aryan society wherein members organized themselves into 3 classes, viz., Brahman, Kshatriya, Vaishya. However, the term Kshatriya is used to indicate second of the four great Hindu caste.  Traditionally, Kshatriya constitute the ruling and military elite. They were in charge of the protection of the society by fighting in war-time and governing in peace-time.

Hindu religious texts assigned Vaishyas to traditional roles in agriculture and cattle-rearing but over time they came to be landowners, traders and money-lenders. 

Shudras are commonly known as servers to Brahnims, Kshatriyas and Vaishyas. they are one of the most downsized groups in the Indian structure.

 Dasas is a term that initially had the connotation of "enemy". They were referred to as "servants of God" and "devotees".